| /* |
| * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.nio.fs; |
| |
| import java.nio.file.CopyOption; |
| import java.nio.file.OpenOption; |
| import java.nio.file.WatchEvent; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * Provides support for handling JDK-specific OpenOption, CopyOption and |
| * WatchEvent.Modifier types. |
| */ |
| |
| public final class ExtendedOptions { |
| |
| // maps InternalOption to ExternalOption |
| private static final Map<InternalOption<?>, Wrapper<?>> internalToExternal |
| = new ConcurrentHashMap<>(); |
| |
| /** |
| * Wraps an option or modifier. |
| */ |
| private static final class Wrapper<T> { |
| private final Object option; |
| private final T param; |
| |
| Wrapper(Object option, T param) { |
| this.option = option; |
| this.param = param; |
| } |
| |
| T parameter() { |
| return param; |
| } |
| } |
| |
| /** |
| * The internal version of a JDK-specific OpenOption, CopyOption or |
| * WatchEvent.Modifier. |
| */ |
| public static final class InternalOption<T> { |
| |
| InternalOption() { } |
| |
| private void registerInternal(Object option, T param) { |
| Wrapper<T> wrapper = new Wrapper<T>(option, param); |
| internalToExternal.put(this, wrapper); |
| } |
| |
| /** |
| * Register this internal option as a OpenOption. |
| */ |
| public void register(OpenOption option) { |
| registerInternal(option, null); |
| } |
| |
| /** |
| * Register this internal option as a CopyOption. |
| */ |
| public void register(CopyOption option) { |
| registerInternal(option, null); |
| } |
| |
| /** |
| * Register this internal option as a WatchEvent.Modifier. |
| */ |
| public void register(WatchEvent.Modifier option) { |
| registerInternal(option, null); |
| } |
| |
| /** |
| * Register this internal option as a WatchEvent.Modifier with the |
| * given parameter. |
| */ |
| public void register(WatchEvent.Modifier option, T param) { |
| registerInternal(option, param); |
| } |
| |
| /** |
| * Returns true if the given option (or modifier) maps to this internal |
| * option. |
| */ |
| public boolean matches(Object option) { |
| Wrapper <?> wrapper = internalToExternal.get(this); |
| if (wrapper == null) |
| return false; |
| else |
| return option == wrapper.option; |
| } |
| |
| /** |
| * Returns the parameter object associated with this internal option. |
| */ |
| @SuppressWarnings("unchecked") |
| public T parameter() { |
| Wrapper<?> wrapper = internalToExternal.get(this); |
| if (wrapper == null) |
| return null; |
| else |
| return (T) wrapper.parameter(); |
| } |
| } |
| |
| // Internal equivalents of the options and modifiers defined in |
| // package com.sun.nio.file |
| |
| public static final InternalOption<Void> INTERRUPTIBLE = new InternalOption<>(); |
| |
| public static final InternalOption<Void> NOSHARE_READ = new InternalOption<>(); |
| public static final InternalOption<Void> NOSHARE_WRITE = new InternalOption<>(); |
| public static final InternalOption<Void> NOSHARE_DELETE = new InternalOption<>(); |
| |
| public static final InternalOption<Void> FILE_TREE = new InternalOption<>(); |
| |
| public static final InternalOption<Void> DIRECT = new InternalOption<>(); |
| |
| public static final InternalOption<Integer> SENSITIVITY_HIGH = new InternalOption<>(); |
| public static final InternalOption<Integer> SENSITIVITY_MEDIUM = new InternalOption<>(); |
| public static final InternalOption<Integer> SENSITIVITY_LOW = new InternalOption<>(); |
| } |